US2936293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reacting monoesters of fatty acids and pentaerythritol with aromatic diisocyanates and preparing porous resins therefrom
Assignee: 3M Co
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Filing: 1952-11-28
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Granted: 1960-05-10
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Expires: 1972-11-28
Abstract
No abstract record available.
Inventors
- 👤 Jr George Otto Orth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08G2110/00; C08G2110/0025; C08G2110/0083
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
IN A PROCESS FOR FORMING A POROUS RESIN BODY, THE STEPS OF PRE-REACTING AN EXCESS OF A TOLYLENE DI-ISOCYANATE WITH A MONOESTER OF A FATTY ACID CONTAINING 18 CARBON ATOMS AND PENAERYTHRITOL IN THE PRESENCE OF A PENTAERYTHRITOL DIPROPIONAL TO FORM A RESINOUS MASS WITH FREE DISOCYANATE GROUPS STILL AVAILABLE, THEN ADDING THERETO A TETRIARY AMINE CATALYST AND A POLYHYDRIC ALCOHOL CONTAINING AT LEAST 3 ACTIVE HYDROGENS, AND FOAMING SAID MASS BY MIXING IT WITH SAID ADDED INGREDIENTS IN THE PRESENCE OF WATER.
Claim 2
Dependent Claim
83 words
IN A PROCESS FOR FORMING A POROUS RESIN BODY, THE STEPS OF PRE-REACTING AN EXCESS OF A TOLYLENE DI-ISOCYANATE WITH A MONOESTER OF A FATTY ACID CONTAINING 18 CARBON ATOMS AND PENAERYTHRITOL IN THE PRESENCE OF A PENTAERYTHRITOL DIPROPIONAL TO FORM A RESINOUS MASS WITH FREE DISOCYANATE GROUPS STILL AVAILABLE, THEN ADDING THERETO A TETRIARY AMINE CATALYST AND A POLYHYDRIC ALCOHOL CONTAINING AT LEAST 3 ACTIVE HYDROGENS, AND FOAMING SAID MASS BY MIXING IT WITH SAID ADDED INGREDIENTS IN THE PRESENCE OF WATER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |